<global> 
   foo = 2
</global> 

<shared fooshared> 
  bar = 3
</shared> 

<instance config_in_main_simple> 
   foo = 1
   bar = 2
   baz = 3
</instance> 

<instance config_in_main_with_global>
   bar = 4
   baz = 5
</instance> 

<instance config_in_main_with_shares> 
   use fooshared 
   baz = 2
</instance>